feee9a7cb976920f12e3c463df3c7043e556db029bcc78dcf98bf30275a3efc7

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25-02-2024 17:41

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General

Target

2024-02-25_926f690ed750e81993c97f8f6d067e2b_cryptolocker.exe
Size

99KB
MD5

926f690ed750e81993c97f8f6d067e2b
SHA1

657302c1023869b7f32f7b7c8d527f76980ffffe
SHA256

feee9a7cb976920f12e3c463df3c7043e556db029bcc78dcf98bf30275a3efc7
SHA512

665e6bc520d2cbede91e957497ff821152f023f9a6f072811bcb0d43e736dd646c301708254ea7d7bfeb0cfc26170ae3bd977630377e01b4f9f97b303490e37e
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPeB5:AnBdOOtEvwDpj6zK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000230f8-13.dat	CryptoLocker_rule2
behavioral2/memory/4820-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3792-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000230f8-13.dat	CryptoLocker_set1
behavioral2/memory/4820-22-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3792-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00070000000230f8-13.dat	UPX
behavioral2/memory/4820-22-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3792-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	2024-02-25_926f690ed750e81993c97f8f6d067e2b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3792	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00070000000230f8-13.dat	upx
behavioral2/memory/4820-22-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3792-26-0x0000000000500000-0x000000000050F000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 3792	4820	2024-02-25_926f690ed750e81993c97f8f6d067e2b_cryptolocker.exe	88
PID 4820 wrote to memory of 3792	4820	2024-02-25_926f690ed750e81993c97f8f6d067e2b_cryptolocker.exe	88
PID 4820 wrote to memory of 3792	4820	2024-02-25_926f690ed750e81993c97f8f6d067e2b_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-25_926f690ed750e81993c97f8f6d067e2b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_926f690ed750e81993c97f8f6d067e2b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
100KB

MD5
41ae730634994cdac6e5b39414726f07

SHA1
6d939b2bb44900eb8042f0a4bdfe53ab155fc517

SHA256
b56c3929b032c360d80e5be94c5733caec1740b23f3e5edb515b99268ef0688d

SHA512
636acb8043e44229f6a45d15ecb9551d0cc31382f810cf49af5407232ef17ed962eccda11d43ba66988f94efcf0624b465a1f7f3575e005bbc91c24d88524471

Download Submit
memory/3792-18-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3792-19-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/3792-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4820-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4820-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4820-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4820-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4820-22-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download